TORRVAC Technical Services
Vacuum Metallurgy Equipment Specialist

Exclusively for Field Repair & Maintenance

Your Subtitle text

Helium Leak Detection Services | High Vacuum Equipment

Helium Leak Testing or HLT,   

TORRVAC offers helium leak testing services in shop or at your facility, We use a Stanford Research Systems Residual Gas Analyzer with a Closed Ion Source which enables us to excel in leak detecting services for research, industrial, commercial, production operations in all aspects of the industry. Helium leak testing is a non-destructive form of testing. Highly effective, we are able to detect leaks in the 10-11 standard cc/sec range. Vacuum testing is done by connecting the test object to the leak detector, evacuating the object then spraying helium around the object. If a leak is present helium will enter the leak and show as an indication on the leak detector. Typically used on items such as bellows, electronic tubes, and vacuum chambers or systems.

We also offer in house and on site Helium Leak Detection Services tailored to your exact requirements, Vacuum leaks can be a major cause of equipment downtime and process problems. To quickly and effectively find small leaks often requires specialised equipment and know-how. If you can’t come to us, we will bring our leak detector equipment and expertise to you and remember, we have vast knowledge and years of experience which will allow us to detect leaks in your manufacturing enviroment - no matter how small they are!

Helium Leak Detector Schematic


1Vessel is evacuated with a vacuum pump as the component is simultaneously charged with nitrogen for strength / pressure test
2Component is isolated and pressure monitored. A drop in pressure signals a large 'Gross' leak and so fails.
3Component passes gross test and pressure is vented
4To ensure good helium concentration the component is evacuated with a vacuum pump
5Vessel vacuum levels are good so leak detector opens onto vessel. Any helium escaping into the vessel (from the component) will be quantified by the helium leak detector
6Once the leak detector is ready, helium is charged into the component
7Helium is sampled by the leak detector and the levels must remain below 'X' for a pass. If the levels are above 'X' the component is a fail
8Helium is vented from the component (can also be recovered for re-use)
9Component is evacuated (reduce contamination and for safety), then component and vessel are vented to atmosphere. End of cycle.

Helium Leak Testing is the only method possible for these tighter leak rate requirements.

Types of Leaks

  • Connections or joints
  • Weld leaks
  • Apparent or virtual leaks (trapped volume)
  • Permeation leaks
  • Thermal leaks


Pickup and delivery are free within a 75-mile radius of portals. Outside the area, we arrange shipment by common carrier. Please note that the repair prices quoted include ground freight charges within the Continental US. Call our Home Office for details before shipping an item.

Why do you need Torr Vacuum Technical Services? 


  • Save money
  • Conserve valuable resources
  • Less downtime means more productivity
  • No internal employees to manage
  • Security
  • Safety
  • Growth management
  • 24/7 service support
  • Peace of mind



Stanford Research Systems Residual Gas Analyzer with Closed Ion Source

Website Builder